I Had a Covid Scare in London. Here’s Why I Love the National Health Service

At first, I chalked up my symptoms — headache, soreness, dry mouth — to veisalgia, the medical term for a hangover. The multiple martinis imbibed the night before did point in that direction. But then came the scratchy throat and the chills. A head cold? Sinus infection? Or could it be Covid-19 — specifically, the dreaded Omicron variant?It wasn’t so far-fetched. I was visiting London, which has quickly become…